989 resultados para Johnson, Fred G., 1892-
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geordnet und übersetzt von W. Heidenheim
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geordnet und übersetzt von W. Heidenheim
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geordnet und übersetzt von W. Heidenheim
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geordnet und übersetzt von W. Heidenheim
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geordnet und übersetzt von W. Heidenheim
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geordnet und übersetzt von W. Heidenheim
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geordnet und übersetzt von W. Heidenheim
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geordnet und übersetzt von W. Heidenheim
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geordnet und übersetzt von W. Heidenheim
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During CO2 storage operations in mature oilfields or saline aquifers it is desirable to trace the movement of injected CO2 for verification and safety purposes. We demonstrate the successful use of carbon isotope abundance ratios for tracing the movement of CO2 injected at the Cardium CO2 Storage Monitoring project in Alberta between 2005 and 2007. Injected CO2 had a d13C value of -4.6±1.1 per mil that was more than 10 per mil higher than the carbon isotope ratios of casing gas CO2 prior to CO2 injection with average d13C values ranging from -15.9 to -23.5 per mil. After commencement of CO2 injection, d13C values of casing gas CO2 increased in all observation wells towards those of the injected CO2 consistent with a two-source end-member mixing model. At four wells located in a NE-SW trend with respect to the injection wells, breakthrough of injected CO2 was registered chemically (>50 mol % CO2) and isotopically 1-6 months after commencement of CO2 injection resulting in cumulative CO2 fluxes exceeding 100000 m**3 during the observation period. At four other wells, casing gas CO2 contents remained below 5 mol % resulting in low cumulative CO2 fluxes (<2000 m**3) throughout the entire observation period, but carbon isotope ratios indicated contributions between <30 and 80% of injected CO2. Therefore, we conclude that monitoring the movement of CO2 in the injection reservoir with geochemical and isotopic techniques is an effective approach to determine plume expansion and to identify potential preferential flow paths provided that the isotopic composition of injected CO2 is constant and distinct from that of baseline CO2.
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Transmembrane protein tyrosine phosphatases, such as CD45, can act as both positive and negative regulators of cellular signaling. CD45 positively modulates T cell receptor (TCR) signaling by constitutively priming p56lck through the dephosphorylation of the C-terminal negative regulatory phosphotyrosine site. However, CD45 can also exert negative effects on cellular processes, including events triggered by integrin-mediated adhesion. To better understand these opposing actions of tyrosine phosphatases, the subcellular compartmentalization of CD45 was imaged by using laser scanning confocal microscopy during functional TCR signaling of live T lymphocytes. On antigen engagement, CD45 was first excluded from the central region of the interface between the T cell and the antigen-presenting surface where CD45 would inhibit integrin activation. Subsequently, CD45 was recruited back to the center of the contact to an area adjacent to the site of sustained TCR engagement. Thus, CD45 is well positioned within a supramolecular assembly in the vicinity of the engaged TCR, where CD45 would be able to maintain src-kinase activity for the duration of TCR engagement.
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Back Row: ass't coaches Ron Vanderlinden, Bob Thornbladh, Milan Vooletich, Paul Schudel, Dennis Brown, Jack Harbaugh, Bill McCartney, Jerry Hanlon, Don Nehlen, Tirrel Burton, Les Miles, Mike Gittleson, Fritz Seyferth, Jim Kozlowski
9th Row: student manager Tom Anderson, trainer Russ Miller, eqp. manager Jon Falk, Curtis Antrum, Bill Jacoby, Ethington, Robin Koschalk, Scott Roberts, Mike Korowin, Ali Haji-Sheik, Anthony Carter, Chip Pederson, Roger Gaudette, Bob Patek
8th Row: Jerry Burgei, Jeff Cohen, Duke Hayes, John Brown, Jim Herrman, Joe Mosketti, Todd Triplett, Dan Yarano, Bill Bonnell, Paul Girgash, Ken Gear, John Lott, Ricky Davis, Nate Davis
7th Row: Karl Tech, Doug Agnew, Rich Hewlett, Steve O'Donnell, Craig Dunaway, Jerald Ingram, Winfred Carraway, Mike Cade, Jimbo Davis, Keith Bostic, Larry Ricks, Brad Fischer, Kevin Ssmith
6th Row: Brian Carpenter, Vince Shaw, Tom Neal, Dave Brewster, Sanford Washington, Fred Brockington, Mike Lemirande, Rich Strenger, Norm Betts, Tony Kelsie, Mike Petsch, Mike Czarnote, Kevin Longe, Marion Body
5th Row: Jeff Reeves, Jim Paciorek, Butch Woolfolk, Cedric Coles, Tom Garrity, Mark Warth, Ed Muransky, Bubba Paris, Chuck Rowland, Robert Thompson, Zeke Wallace, Gary Lee, Jeff Felten
4th Row: Brad Bates, Jim Breaugh, Oliver Johnson, Fred Motley, Kelly Keough, John Prepolec, Tony Osbun, Dan Kwiatkowski, Chuck Christian, Greg Wunderli, Tom Wandersleben, Mike Kligis, Bryan Virgil, Frank Raiford
3rd Row: Tom Moss, Stan Edwards, Dave Nicolau, Stu Harris, Ben Needham, Kurt Becker, Chuck Hetts, Mike Trgovac, andy Cannavino, Rodney Feaster, B.J. Dickey, Alan Mitchell, Tony Jackson, Irvin Johnson
2nd Row: James Humphries, Gary Quinn, Dan Murray, Tony Leoni, John Wangler, Gary Weber, Mel Owens, George Lilja, Mike Leoni, Lawrence Reid, Roosevelt Smith, David Payne, Tom Keller, Jay Allen
Front Row: Gerald Diggs, Mark Braman, Mike Jolly, John Powers, co-capt. Ron Smpkins, co-capt. John Arbeznik, Curtis Greer, Dale Keitz, Ralph Clayton, Chris Godfrey, Doug Marsh, Mike Harden, coach Bo Schembechler
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Mode of access: Internet.
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"June 1979."
